EO2S 2026: Europe's Premier Open Source E-commerce Summit Unveiled in Paris
Dive into the future of e-commerce with this essential guide to EO2S 2026.
Reading Time: Approximately 10-12 minutes
Last Updated: March 21, 2026
EO2S 2026: Reshaping the Open Source E-commerce Landscape
Prepare for a groundbreaking event! The Ecommerce Open Source Summit (EO2S 2026) is set to become Europe's defining gathering for the open source e-commerce community. Mark your calendars for March 26, 2026, as professionals converge at Le Nida in Issy-les-Moulineaux, near Paris. This pivotal summit is spearheaded by Friends of Presta, a dynamic non-profit association boasting over 1,000 Slack members.
A highlight of EO2S 2026 will be the inaugural joint appearance of PrestaShop and Sylius leadership, following their strategic merger at the close of 2025, sparked by cyber_Pixel's acquisition of PrestaShop. The visionary Mikołaj Król, CEO of both platforms, will deliver the highly anticipated closing keynote. Attendees can expect a rich program featuring more than 17 sessions, covering critical themes like artificial intelligence, cybersecurity, e-invoicing compliance, and the pressing issue of digital sovereignty.
Secure your spot for just €30 at shop.friendsofpresta.org.
Too Long; Didn't Read? Here's the 30-second scoop: For the first time, PrestaShop and Sylius share a stage. Witness the debut of the French CMS E-commerce Barometer. Enjoy 17+ insightful sessions and connect with over 150 industry leaders. All happening on March 26 in Paris for only €30.
EO2S 2026 Agenda: Five Unmissable Highlights
1. The French CMS E-commerce Barometer (Opening Keynote — 9:15 AM)
The summit kicks off with what promises to be a game-changing announcement: the unveiling of the first-ever French CMS E-commerce Barometer.
Why is this so crucial? Up until now, a comprehensive, data-driven overview of France's open source e-commerce market has been non-existent. Without independent, robust data, discussions have been fueled by estimations from Shopify, WooCommerce, and assumptions about PrestaShop, leaving a significant void in factual understanding.
This groundbreaking keynote will be jointly presented by Olivier Binet (Managing Director, PrestaShop), Christophe Vidal (President, Friends of Presta), and Thomas Rayrat (Vice President, Friends of Presta). This data is directly relevant to any e-commerce professional, from developers and integrators to merchants and software vendors. This barometer is poised to become the definitive resource for consultants, media, and decision-makers seeking reliable insights into the open source e-commerce landscape.
2. PrestaShop and Sylius: A Historic Joint Unveiling
A year after the launch of PrestaShop's impactful Call for Contribution, Paule Morizot (Head of Product, PrestaShop) will lead a session with key contributors to review progress. Attendees will gain insights into successful initiatives, the evolution of community governance, and current strategic priorities.
This session also offers a unique opportunity to understand Sylius's integration into this evolving ecosystem and, crucially, how both projects plan to foster collaboration on their shared Symfony foundation.
3. E-Invoicing with PrestaShop: Navigating 2026 Mandates
Mandatory e-invoicing in France and across Europe (under EU Directive 2014/55/EU) remains a complex issue for many merchants. A vital roundtable, moderated by Marie-Sophie Cuinet (VP Category Management, PrestaShop), will feature experts from Atoo Next and OpenSI for a practical discussion on:
- The current state of e-invoicing obligations: timelines, potential penalties, and exemptions.
- Available open source solutions to ensure compliance.
- Best practices for a smooth migration without disrupting existing operations.
If your e-commerce platform isn't yet ready for e-invoicing, this session is an absolute must-attend.
4. Diverse Sessions: AI, SEO, Cybersecurity, and Digital Sovereignty
The EO2S 2026 program boasts a comprehensive array of sessions, exploring critical aspects of modern e-commerce:
- Agentic Commerce: Unpack how AI is enabling autonomous purchasing decisions.
- AI in E-commerce: Explore real-world applications beyond basic chatbots.
- SEO in the AI Age: Understand how AI language models interpret and rank your product listings.
- E-commerce Cybersecurity: Address 2026's most significant threats, effective defenses, and essential best practices.
- Digital Sovereignty: Discover the powerful arguments for open source solutions against reliance on US SaaS offerings.
- Sylius Migration: Learn from practical experiences and recommended strategies for migrating to Sylius.
- PrestaShop Internationalization: Master the art of global expansion without complexity.
For those deeply interested in AI's role in e-commerce, a prior article on AI governance in PrestaShop offers foundational knowledge for implementing artificial intelligence effectively.
5. Mikołaj Król: The PrestaShop & Sylius Closing Keynote
The summit culminates with the highly anticipated closing keynote from Mikołaj Król, CEO of both PrestaShop and Sylius since their late-2025 merger. This marks his first public address to the combined communities.
Beyond an inspiring vision, attendees can anticipate concrete announcements regarding:
- The technical roadmap for the convergence of PrestaShop and Sylius.
- Expected synergies and collaborative efforts between the two robust platforms.
- Europe's open source strategy to counter market concentration and promote competition.
Meet Mikołaj Król: The Visionary Behind PrestaShop & Sylius
At the heart of the closing keynote is Mikołaj Król, a leader with a profound technical background. Before stepping into his current role, he was instrumental in Sylius's ascent, transforming it into one of Europe's most advanced Symfony-based e-commerce frameworks. His engineering-first approach distinguishes him from many traditional marketing-focused keynotes in the industry.
His appointment to lead both PrestaShop and Sylius following cyber_Pixel's acquisition of PrestaShop in late 2025 was a strategic choice. Król embodies a leader deeply familiar with the technology, committed to development and innovation rather than mere management.
His closing address at EO2S 2026 is poised to be a landmark moment in his nascent tenure, signaling a new direction for both platforms.
EO2S vs. FOP Days: A Clear Evolution
The transformation from "FOP Days" to "EO2S" is far more than a simple name change; it signifies a substantial leap in maturity and ambition. Here's a breakdown of the key differences:
| Former format (FOP Days) | New format (EO2S) |
|---|---|
| Primarily focused on PrestaShop | Embraces the entire European open source ecosystem |
| Technical day structure | Comprehensive conference, roundtables, workshops, networking |
| Audience: Developers/technical roles | Mixed audience: developers, merchants, decision-makers, agencies |
| Community-driven sessions | Structured program with keynotes, roundtables, and workshops |
| Local (France-centric) | Explicitly European in scope and ambition |
This evolution marks Friends of Presta's transition from a community meetup to a sophisticated, professional industry event.
On-Site Partners: A Complete E-commerce Ecosystem
EO2S 2026 will host a diverse array of partners, collectively representing the full spectrum of the open source e-commerce ecosystem:
| Partner | Positioning | Site |
|---|---|---|
| PrestaShop | Open source e-commerce CMS | friendsofpresta.org |
| Sylius | Symfony e-commerce framework | friendsofpresta.org |
| OpenSi | Open source ERP/PIM for commerce | friendsofpresta.org |
| Atoo Next | E-invoicing solutions | friendsofpresta.org |
| Lyra | Online payments | friendsofpresta.org |
| Mollie | Payment platform | friendsofpresta.org |
| Crisp | Chat and customer support | friendsofpresta.org |
| Doofinder | E-commerce search / SEO | friendsofpresta.org |
| Store Commander | PrestaShop administration tools | friendsofpresta.org |
| KerAwen | Open source POS software | friendsofpresta.org |
| Motive | E-commerce logistics | friendsofpresta.org |
| Gladhost | Hosting | friendsofpresta.org |
| Versus Venture | Holding PrestaModule & BusinessTech | friendsofpresta.org |
These partners collectively enhance the entire value chain for online stores, providing comprehensive solutions and expertise.
What EO2S 2026 Reveals About Open Source E-commerce's Future
EO2S 2026 transcends its program; it's a powerful statement that European open source e-commerce isn't merely surviving, but actively undergoing a dynamic restructuring.
Consider these compelling points:
- PrestaShop boasts over 200,000 active stores across 80+ countries, solidifying its position as a market leader in France, Poland, and Spain (Source: PrestaShop).
- The strategic merger of PrestaShop and Sylius forges a cohesive technical entity, built on a shared Symfony foundation with a convergent roadmap.
- The Friends of Presta community (a non-profit with over 1,000 members) provides a robust and independent governance framework.
- Growing demand for sovereignty-focused solutions—prioritizing European hosting, data residency in Europe, and reducing reliance on US hyperscalers—presents a significant market opportunity.
EO2S 2026 marks the first major public event of this transformative era. Should it live up to its promise, the French CMS E-commerce Barometer could become an indispensable reference for industry professionals.
Who Should Attend (And Who Might Consider Skipping)
Let's be candid. Not every event is a fit for everyone. Here’s a straightforward breakdown to help you decide:
This event is for you if you are…
- A PrestaShop / Sylius Developer: The in-depth technical sessions on Sylius migration and future architectural plans will provide invaluable insights into the platform's trajectory. It’s also an unparalleled opportunity to network with core contributors and expand your professional circle.
- An E-commerce Merchant with Substantial Volume: The e-invoicing roundtable alone offers crucial compliance guidance. Furthermore, the new barometer data will equip you with robust arguments for your strategic business discussions.
- An Agency Owner or Module Vendor: This is your prime opportunity to grasp market trends, forge new partnerships, and connect with potential clients. Nothing beats the power of in-person networking.
- An IT Decision-Maker Concerned with Sovereignty: The open source versus US SaaS debate gains new dimensions with the PrestaShop + Sylius merger. This summit is the perfect occasion to assess if this direction aligns with your organizational needs.
You might consider skipping if…
- Your primary goal is aggressive client acquisition: This isn't a traditional B2B trade show designed for mass prospecting. It's a professional gathering where the quality of your network relationships outweighs sheer quantity.
- You have no ties to the PrestaShop/Sylius ecosystem: While open to the broader European open source community, EO2S retains a strong specialization. You might find yourself a bit out of sync with the core discussions.
5 Essential Questions to Ask at EO2S 2026
If you're planning to attend EO2S 2026, I encourage you to prepare these probing questions for the speakers:
- What is the precise, detailed roadmap for PrestaShop + Sylius convergence? We're looking for concrete steps, not just broad promises.
- How will the PrestaShop module system evolve? Will my current modules remain compatible and functional in three years' time?
- What are the tangible benefits of "digital sovereignty" for a merchant? Beyond the rhetoric, what practical advantages can businesses expect?
- How will community governance be structured moving forward? Who will make decisions, how will they be made, and what level of transparency can we expect?
- What is the definitive timeline for mandatory e-invoicing compliance? Clarify specific dates, potential penalties, and any available exemptions.
Practical Information for EO2S 2026
EO2S — Ecommerce Open Source Summit
- Date: March 26, 2026
- Venue: Le Nida, Issy-les-Moulineaux (Paris)
- Doors Open: 8:30 AM (coffee & networking)
- Tickets: €30 — Purchase yours at shop.friendsofpresta.org
- Organizer: Friends of Presta (non-profit association)
- Expected Attendance: Approximately 150+ professionals
- Official Hashtag: #EO2S2026
Conclusion: Your Verdict on EO2S 2026
Whether you're a:
- PrestaShop / Sylius developer: Expect cutting-edge technical sessions, invaluable networking, and direct insight into the roadmap.
- E-commerce merchant: Benefit from critical e-invoicing discussions, market-defining barometer data, and access to key partner solutions.
- Agency / Vendor: It's a strategic opportunity to engage with the ecosystem, identify new business prospects, and conduct competitive benchmarking.
- IT decision-maker: Gain clarity on digital sovereignty and weigh the open source advantage against SaaS models.
EO2S 2026 truly offers something for every professional in the open source e-commerce space. At a mere €30, it stands out as arguably the best value e-commerce event in the first half of 2026.
I'm personally committed to attending. The depth of the program alone warrants the journey, and the unique atmosphere of the first joint meeting of the PrestaShop and Sylius communities since their merger makes this an unmissable historical moment.
I look forward to seeing you on March 26 at Le Nida.
A comprehensive debrief, including key announcements and speaker slides, will be published within 48 hours following the event.
Stay Connected & Level Up Your E-commerce Game!
Enjoyed this deep dive? For more expert insights, analyses, and exclusive content on e-commerce, open source, and the tech world, make sure to:
- Subscribe to my YouTube channel: youtube.com/@ndabene06 for video content that breaks down complex topics.
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